Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '199.43.186.0'
+303
ERRNo PTR record availible DNS server 'pdns5.ultradns.info' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.186.43.199.in-addr.arpa'.